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Summary of Significant Accounting Policies (Detail) - Hierarchy for our financial assets measured at fair value on a recurring basis (USD $)
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Oct. 31, 2012
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Oct. 31, 2011
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| Certificates of deposit– Short-term investments | $ 500,000 | $ 2,249,159 |
| Videocon Industries Limited global depository receipts | 4,728,367 | 5,382,051 |
| Total financial assets | 5,568,060 | 8,236,889 |
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Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
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| Money market funds – Cash and cash equivalents | 339,693 | 5,685 |
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Fair Value, Inputs, Level 1 [Member] | US Government Corporations and Agencies Securities [Member]
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| Money market funds – Cash and cash equivalents | ||
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Fair Value, Inputs, Level 1 [Member]
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| Certificates of deposit– Short-term investments | ||
| Videocon Industries Limited global depository receipts | 4,728,367 | 5,382,051 |
| Total financial assets | 5,068,060 | 5,387,736 |
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Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
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| Money market funds – Cash and cash equivalents | ||
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Fair Value, Inputs, Level 2 [Member] | US Government Corporations and Agencies Securities [Member]
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| Money market funds – Cash and cash equivalents | 599,994 | |
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Fair Value, Inputs, Level 2 [Member]
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| Certificates of deposit– Short-term investments | 500,000 | 2,249,159 |
| Videocon Industries Limited global depository receipts | ||
| Total financial assets | 500,000 | 2,849,153 |
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Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
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| Money market funds – Cash and cash equivalents | ||
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Fair Value, Inputs, Level 3 [Member] | US Government Corporations and Agencies Securities [Member]
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| Money market funds – Cash and cash equivalents | ||
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Fair Value, Inputs, Level 3 [Member]
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| Certificates of deposit– Short-term investments | ||
| Videocon Industries Limited global depository receipts | ||
| Total financial assets | ||
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Money Market Funds [Member]
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| Money market funds – Cash and cash equivalents | 339,693 | 5,685 |
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US Government Corporations and Agencies Securities [Member]
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| Money market funds – Cash and cash equivalents | $ 599,994 |